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Topic: percent yield?  (Read 4875 times)

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Offline Shea

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percent yield?
« on: August 01, 2006, 09:10:23 PM »
Calculate the % yield if 4 moles of ethylene are reacted with excess water to produce 3.8 moles of ethanol.

CH2CH2 + H2O -> CH3CH2OH

What steps must be taken to solve this?  And what's a percent yield?
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Offline Yggdrasil

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Re: percent yield?
« Reply #1 on: August 01, 2006, 10:11:33 PM »
Percent yield = (actual yield) / (theoretical yield) * 100%

Basically you calculate the amount of product expected from the reaction (theoretical yield), and then divide the actual yield by the theoretical yield.
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Offline Shea

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Re: percent yield?
« Reply #2 on: August 01, 2006, 10:25:01 PM »
I can find the theoretical yield, but how do you find the actual yield?
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Offline Yggdrasil

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Re: percent yield?
« Reply #3 on: August 01, 2006, 11:20:18 PM »
Quote from: Shea on August 01, 2006, 09:10:23 PM
to produce 3.8 moles of ethanol.

The actual yield is the amount of product you end up with when the reaction finishes.
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Offline Shea

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Re: percent yield?
« Reply #4 on: August 02, 2006, 12:43:26 AM »
ooohhh.  I feel so stupid...  I totally got it...   TY ::)
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